Non-crystalline device memory array

Details Non-crystalline device memory array Non-crystalline device memory array

G - Physics

11

C

352/82.1

G11C 11/42 (2006.01) G11C 11/39 (2006.01) G11C 13/04 (2006.01) G11C 16/02 (2006.01) H04N 3/15 (2006.01)

Patent

CA 1056057

NON-CRYSTALLINE DEVICE MEMORY ARRAY ABSTRACT OF THE INVENTION An erasable optical memory array having at each storage location a non-crystalline, semiconductor threshold switching device. The threshold voltage of each switching device is strongly temperature dependent and each switching device has a finite recovery time when switched to its low resistance state. Means are provided for periodically sampling each of the switching devices with voltage pulses repetitive at a first frequency and having a first voltage level sufficient to switch to the low resistance state only those switching devices heated above room temperature by a thermal image. Additional means are provided to sample the switching devices at a second frequency greater than the first frequency and at a voltage level less than that of the first voltage level to maintain the switched devices in the low resistance state upon removal of the thermal image.

239430

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